Change colors in the Piano Roll Editor in Logic Pro for Mac
You can change the color of notes in the Piano Roll Editor to display note velocity, region colors, or MIDI channel colors. By default, notes correspond to the region color.
Change the color of notes
In the Logic Pro Piano Roll Editor, do one of the following:
Choose View > Set Note Color in the Piano Roll Editor menu bar, then choose an option from the submenu.
By Region Color: Colors notes to correspond with the MIDI region.
By Velocity: Colors notes to show their MIDI note velocity.
By MIDI Channel: Colors notes to correspond with the MIDI channel.
By Articulation: Colors notes to correspond with the assigned articulation. This option is available only if the track containing the region has an Articulation Set chosen.
Control-click the Piano Roll Editor background, then choose a color assignment from the shortcut menu.